Mining machine



NOV. 25, 1941. J EFFREIY ETAL 2,263,779

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Nov. 25, 1941. R. K. JEFFREY ETAL 2,263,779

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R. K. JEFFREY ETAL MINING MACHINE Filed May 6, 1958 18 Sheets-Sheet 4[MAE/V7025: QOBEQT K. JEFFREY. LEWIS E. MITCHELL.

R. K. JEFFREY ETAL 2,263,779

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Nov. 25, 1941. R. K. JEFFREY ETAL 2,253,779

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Nov. 25, 1941.

R. JEFFREY ET AL MINING MACHINE Filed May 6, 1938 18 Sheets-Sheet l8lilwl filial f/Vl/ENTOEJ.

DOBEQT K. JEFFQEY.

LEWIS E. M \TCHELL.

Patented Nov. 25, 1941 MINING MACHINE Robert K. Jefirey and Lewis E.Mitchell, Columbus, Ohio, assignors to The Jei'l'rey ManufacturingCompany, a corporation of- Ohio Applicatiiln May 6, 1938, Serial No.206,448

20 Claims.

This invention relates to a mining machine of the universal type and oneof the objects of the invention is to provide an improved and eflicientdevice of the type capable of cutting kerfs in any one of a plurality ofintersecting or paral-' lel planes including horizontal planes at anyelevation between a relatively high roof and the floor of a mine roomand also including vertical or shearing kerfs in any vertical planebetween relatively widely spaced apart ribs or side walls of a mineroom.

Another object of the invention is to provide a mining machine of theuniversal type which has a'wide range of operation and which can beoperated with safety, a high'degree of efliciency and economy in mineswhere the available space is relatively small or where the availablespace is relatively large.

Another object of the invention is to provide a mining machine of theuniversal type which can be operated to cut kerfs in any plane betweenthe extreme limits and which can be quickly and easily handled andadjusted with a minimum of manual eilort.

Another object of the invention is to provide a mining machine in whichcutting mechanism is adapted to be fed in a vertical plane by means of ahydraulic system which includes an equalizing relief valve mechanismwhich compensates for the unequal displacement in the hydraulic systemthereby permitting the cutter bar to float while cutting on a curvedportion of the track.

Another object of the invention is to provide a mining machine in-whichthe mining mechanism is fed through the material to be mined at apredetermined maintained speed by means of an hydraulic system whichspeed can be adjusted to any one of a plurality of values.

Another object of the invention is to provide a mining machine in whichan adjustable kerf cutter support includes a cylindrical bearing throughwhich the drive for a kerf cutter extends in which the cylindricalbearing has sleeves which'maintain the driv gearing enclosedirrespective of adjustment of the keri cutter.

Still another object of the invention is to provide a mining machinewith a hydraulic motor in which the flow of hydraulic fluid to the motoris relatively free while the flow of hydraulic fluid from the motor isrestricted.

' Another object of the invention is to provide an improved constructionfor conduits leading to a pivotally mounted hydraulic piston type motor.

Another object of the invention is to provide an improved controlmechanism for a hydraulic control system of a mining machine.

Another object of the'invention is to provide improved means foreffecting continuous hydraulic connections between relatively movableparts of a mining machine.

Another object of the invention is to provide -an improved hydrauliccontrol system particularly useful in connection with mining machines.

Another object of the invention is to provide an improved constructionfor effecting the connection of a plurality of flexible hydraulicconduits to a rotating element of a hydraulically controlled miningmachine.

A furtherobject of the invention is to provide a hydraulic controlsystem with pressure equalizing means whereby the piston of thehydraulic piston type motor will notlock. Other objects of the inventionwill appear hereinafter, the novel features and combinations beingsetforth 'in the appended claims.

In the accompanying drawings:

Fig. 1 is a plan view of .the rear end of the mining machine comprisingour invention;

. Fig. 2 is a continuation of Fig. 1 showingthe central portion of themining machine of our invention;

Fig. 3 is a continuation of Fig. 2 showing the forward end of the miningmachine with the kerf cutting mechanism cut short;

Fig. 4 is a side elevational view of the rear portion of our miningmachine;

Fig. 5 is a combined side elevational and sectional view of the centralportion of our device;

Fig. 6 is a longitudinal sectional view oi the forward portion of ourdevice with the kerf cutting mechanism again shown cut short;

Fig. 7 is an enlarged sectional, detail taken on the line 1-1 of Fig. 2,looking in the direction of the arrows;

Fig. 8 is a combined side and sectional elevational view showing theconstruction of a hydraulic piston motor;

Fig. 9 is a transverse sectional view taken on the line 9-9 of Fig. 8; 1

Fig. 10 is a transverse sectional and elevational view showing aplurality of control valves and operating means therefor;

Fig. 11 is a side view of one of the control devices of Fig. 10; v

Fig. 12 is a side view of another of the control devices of Fig. 10;

Fig. 13 is an enlarged segmental sectional view of the improved pistonconstruction of a hydraulic piston motor comprising our invention;

Fig. 14 is an end elevational view of the structure illustrated in Fig.13;

Fig. 15 is a plan view of the truck of the mining machine of ourinvention showing portions in section;

Fig. 16 is an enlarged sectional view of an actuating element of one ofthe piston motors comprising a feature of our invention;

Fig. 17 is a transverse sectional elevational view of an eleyatinghydraulic piston motor taken on the line of Fig. 2 looking in thedirection of the arrows;

Fig. 18- is a combined sectional and plan view of a portion of ourdevice;

Fig. 19 is a transverse sectional view through the head of the miningmachine of our invention taken approximately on the line |9--|9 of Fig.6, looking in th direction of the arrows;

Fig. 20 is a transverse sectional view taken on the line 2020 of Fig. 6,looking in the direction of the arrows;

Fig. 21 is a transverse sectional elevational view taken on the line2|2| of Fig. 1 of the drawings, looking in the direction of the arrows;

Fig. 22 is a sectional elevational view .taken on the line 22-42 of Fig.1, looking in the direction of the arrows;

Fig. 23 is a sectional elevational view of the volume control of ourinvention;

Fig. 24 is a sectional elevational view of B. volume relief pilot valveof our invention;

Fig. 25 is a transverse sectional elevatlona view taken on the line25--25 of Fig. 1, looking in the direction of the arrows;

Fig. 26 is a longitudinal sectional elevational view showing the drivefor the truck and taken on line 2626 of Fig. 25 looking in the directionof the arrows;

Fig. 27 is a transverse sectional view taken on the line 21-21 of Fig.1, looking in the direction of the arrows;

Fig. 28 is a sectional elevational view taken on the line 28-28 of Fig.27, looking in the direction of the arrows;

Figs. 29 and 30 are sectional elevational views taken on the lines 29-49and 30-30, respectively, of Fig. 27, looking in the direction of thearrows;

Fig. 31 is a transverse sectional elevational view taken on the line3|3| of Fig. 5, looking in the direction of the arrows;

Fig. 32 is a side elevational view of a detail of the apparatus shown inFig. 31;

Fig. 33 is a sectional view showing in detail the rope anchorage andtension means of Fig.

Fig. 34 is a longitudinal elevational sectional view taken on the line34-34 of Fig. 31, looking in the direction of the arrows;

Fig. 35 is a transverse sectional view taken on the line 35-35 of Fig.34, looking in the direction of the arrows;

Fig. 36 is a sectional view showing the construction of the controlvalves for the hydraulic motors;

Fig. 36 is a sectional view similar to Fig. 36;

Fig. 37 is a sectional plan view through the electric motor for drivingthe kerf-cutting mechanism;

Fig. 38 is a sectional elevational view of the equalizing relief valvecomprising a feature of our invention;

Fig. 39 is a diagrammatic illustration of the hydraulic control system;

- from a straight track;

Fig. 45 is a diagrammatic plan view showing the range of vertical kerfswhich may be cut by our mining machine; and

Fig. 46 is a sectional view taken on the line 4646 of Fig. 6, looking inthe direction of the arrows.

The mining machine comprising our invention is mounted upon a truck 45best seen in Figs. 5 and 15 of the drawings comprising a main frameformed by spaced apart longitudinally extending frame members 46, 46which are laterally spaced apart and between which extend transverselyextending forward plate 41 and transversely extending rearward plate 48(Fig. 4) and intermediate transversely extending bolster members 49 and50 (Fig. 5). All of said main frame members 46 to 50, inclusive, arerigidly attached together to form a strong main frame for the truck 45.Said main frame is supported upon a forward axle 5| and a rear axle 52which axle 5| is slidably journaled in adjustable journal boxes 53, 53which may be longitudinally adjusted by adjusting screws 54, 54 toadjust the tension of the driving chain, as hereinafter described. Toassure movement of the axle 5| in parallelism the adjusting screws 54,54 are connected to rotate together by chain'and sprocket mechanism 55.

The journal boxes 53, 53 are held in the main frame against longitudinalmovement but provide for limited vertical movement thereby to permit theshaft 5| to move relative to the longitudinal axis of the truck 45 toprovide a modified three point suspension for said truck 45 so it mayreadily accommodate itself to the unevenness of the mine tracks overwhich the mining machine travels.

The rear end axle 52 is rigidly Journaledto the main frame of the truck45 by appropriate Journal bearings 56, 56 (Fig. 15). The axles 5| and 52are provided with appropriate driving and supporting track engagingflanged wheels 51 all of which are keyed to the respective axles 5| and52 by keys 58. The axles 5|, 52 are connected to rotate in unison-bychain and sprocket mechanism 59. It is thus evident that any drivingforce supplied to axle 52, ashereinafter described, will be transmittedto all four of the Wheels 51 thereby insuring a maximum of traction forpropelling the mining machine which is particularly desirable duringsumping operations. It is, of course, evident that the afore-describedadjusting screws 54 (Fig. 5) provide for the tensioning of the chain andsprocket mechanism 59 by the forward and rearward adjustment of the axle5|.

Associated with the rear axle 52 is a brake mechanism (Fig. 5)comprising a brake drum 60 keyed to shaft 52 with which is associated apair of brake shoes 6| pivoted to a casting 62 carried by bolster 50, tothe rearward free ends of which is associated a clamping mechanism 63operable by a brake lever 64 (Fig. 4) pivoted adjacent the rear end ofthe mining machine on pivot. 69 and

